Home / 221,729.18-305,985.75-121,127.90

Finding the Fourth Proportional to 221,729.18, 305,985.75 and 121,127.90

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Solution

The fourth proportional to 221,729.18, 305,985.75 and 121,127.90 is: 167,156.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,729.18 : 305,985.75 = 121,127.90 : x
  2. Step 2: Convert to fraction form
    221,729.18/305,985.75 = 121,127.90/x
  3. Step 3: Cross multiply
    221,729.18x = 305,985.75 × 121,127.90
  4. Step 4: Simplify right side
    221,729.18x = 37,063,411,327.43
  5. Step 5: Solve for x
    x = 37,063,411,327.43/221,729.18
  6. Step 6: Final answer
    x = 167,156.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.